Question

If a car travelled a distance of 100 km in 2 hours and later travelled 60 km in 3 hours, find the average of its speeds?

• A. 35 km/hr
• B. 30 km/hr
• C. 25 km/hr
• D. 20 km/hr

Answer 1

The correct option is A 35 km/hr

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Speed 1 = $\frac{Distance1}{Time1}$ = $\frac{300}{4}$ = 50 km/hr

Speed 2 = $\frac{Distance2}{Time2}$ = $\frac{60}{3}$ = 20 km/hr

Average of Speeds =$\frac{50+20}{2}$ = $\frac{70}{2}$ = 35 km/hr